Stay-grinding machine.



H. A. KELLER. STAY GRINDING MACHINE. APPLIUATION FILED SBPT.B,1914.

Patented Dec. 29, 1914. v

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H. A. KELLER. STAY GRINDING MACHINE. APPLICATION FILED SEPT. 8, 1914.

1% l @7772627 w/ f @y Patented Dec. 29, 1914.v

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IHHIIHIIIII ggg H. A. KELLER. STAY GRINDING MACHINE. APPLICATION FILED sBPT.8,1914.

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Patented Dec. 29, 1914.

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HERMAN A. KELLER, F CHICAGO, ILLINOIS, ASSIGNOB. TO KABO CORSET CO., OF CHICAGO, ILLINOIS, A CORPORATION OF TEST VIRGINIA.

STAY-GR-INDING MACHINE.

Specication of Letters Patent.

Patented Dec. 29, 1914:.

App1ication led September 8, 1914. Serial No. 860,663.

To all whom t may concern Be it known that I, HERMAN A. KELLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stay-Grinding Machines, of which the following is a specilication.

The present invention relates to certain `portions of a machine used for automatically grinding tapered corset stays.

The object of the present invention is to provide means for automatically and quickly changing the speed of the feed rolls from a slow to a fast movement and vice versa whereby the speed of movement of the work through the machine is varied in accordance with the position of the grinders.

The invention further consists in the features of construction and` combination of parts hereinafter described and claimed.

In the drawings: Figure 1 is a side elevation of a portion of the stay grinder showing the mechanism of the present invention; Fig. 2 is a plan view; Fig. 3 is a front view showing the differential pulleys and essary to state that a lower grinder 7 .an upper grinder l8 is employed and :the

the belt shifting device; Fig. 4 is a plan view of the belt shifting member of the belt shifting device; Fig. 5 is a detail of the cam which actuates the belt shifting device; and Fig. 6 is a detail of the cam which raises and lowers the upper grinder member.

IThe appliance of the present invention. as stated, is used in connection with a machine for automatically grinding corset stays to produce what is known as a tapered tip stav.

The particular type of stay grinder with which the present invention is illustrated, is that disclosed in Patent No. 1,102,211, granted Juner 30, 1914, to De Long. Although, of course, the invention may be used with other types of stay grinder. The invention, however, is not deemed practical for use in conjunction with any other type of machine than the continuous feed type; that is, a machine where the work is fed through the machine continuously and in one direction only.

As stated, the stay grinder which is shown is fully illustrated in the De Long patent above referred to, a detailed description will not therefore be given. It is only nec upper grinder is movable in and out with respect to the lower grinder and the work. The strip of work 9 passes between the grinders and is continuously fed in one direction. The upper grinder is rotated by means of a belt 10 from a pulley 11 and the lower grinder by a belt 10a from a pulley 10b the upper grinder is raised and lowered and moved in and out with respect to the work through the medium of a swinging arm 12 actuated by a cam 13 (see Fig. 6j and said arm is held normally downward by a spring 14. The effect of the action of the cam 13 is to raise and lower the arm 12 and bring the grinder 8 into and out of operative engagement with the work at periodical intervals.

A suitable train of gearing is employed for rotating the shaft 15 on which the cam 13 is located. In order to render the machine practical. that is make its operation of sufficient speed to produce stays in practical quantities, it is necessary that the work be advanced more quickly during the period of non-grinding than during the period of grinding. Feed rolls 16 are utilized for moving the work through the machine and it is to provide a mechanism for alternately actuating these feed rolls fast and slow that the present invention has been devised. The feed rolls. as shown, are driven bv means of a suitable train of gearing actuated -from a shaft 17 to which is joined a pulley 18 over which travels a belt 19 driven bv a pulley 20 attached to a driven shaft 21. The main drive shaft 22 is illustrated in Figs. 3 and 4 and it is to this main drive shaft that the pulleys 10b and 11 are connected which operate the grinders 7 and 8.

Mounted on the shaft 22 is a pulley 23 and a pulley 24. the latter being of smaller diameter. On the driven shaft 21 is a fast pulley 25 and a loose pulley 26, also a loose pulley 27 and a. fast pulley 28. The pulleys 25 and 26 are driven by a belt 29 which is actuated by the pulley 24 of the shaft 22. The pulleys 27 and 28 are actuated by a belt 30 driven bv the pulley 23 of the shaft 22. Shifters 31 are provided for the belts 29 and 30. There is one shifter for the belt 29 and one for the belt 30 both of which are joined to a rod 32. Each shifter is similar in formation and consists of a rod 33 with arms 34 extending therefrom and constituting a fork. The rod32 is joined lto al bar or lever 35 pivoted at 36, and a link 37 is connected 39. This rocking arm has upon its end a roller 40 which rides upon a cam 41 on the shaft 15. It is obvious that as the rocking arm 38 is actuated it will reciprocate the link37 up and down rocking the lever 35 about its pivot 36 swinging the rod 32 in one direction or the other depending on the direction of movement and by reason of the belt shifters transferring the belts,29 and 30 from one tothe other of the fast and loose pulleys 25 and 26, and 27 and 28.

As illustrated in the drawings, the grinder 8 is in grinding position. The belt Shifters are so positioned that the belt 29 is on the fast pulley 25 and the belt 30 is on the loose pulley 27 so that power is communicated from the shaft 32 to the shaft 21 by means of the belt 29, pulley 24, and pulley 25. The pulley 24 is a small pulley. The' pulley 25 is a large pulley, hence there is a reduced speed being transmitted from the shaft 22 to the shaft 2l. The pulley 2') on the shaft 21 is therefore being driven at reduced speed Vdriving the belt 19 at reduced speed, this drives the pulley 18 at a reduced speed, and the shaft 17 at reduced speed. This imparts -a slow movement to the train of gearing which connects the shaft 17 with the feed rolls 16, hence these feed rolls are being driven at a slow speed and the work is advanced through the machine with a slow ymovement as it should be during the grinding operation.

When the cam 13 is rotated so that the low part of the cam engages the roller 40 the grinder 8 will be -lifted and the grinding operation upon the work will cease. When this has been brought about the high part of the cam 41 will engage with the roller 40, rock the arm 38, forcing downward the link 37, pushing the lever 35 into the position shown in dotted lines in Fig. 3, swinging the rod 32 into the dotted position shown in said figure and moving the belt Shifters into the dotted position shown in said figure, `this will move thek belt 29 from the fast pulley-25 onto the loose pulley 26, and move the belt 30, from the loose pulley 27 onto the fast pulley 28. Hence in this position power will be transmitted from the shaft 22 tothe shaft 21 by means of the pulley 23, belt 30, and pulley 28. The pulley 23 is a large pulley and the pulley 28 is a small pulley, and thus 4the speed imparted from the shaft 22 to the shaft 21 will be increased andthe shaft 21 driven at a relatively high rate of speed. This will actuate the pulley 20 and pulley 19 at a high rate of speed imparting to the pulley 18 a fast speed and actuating the train of gearing connecting this pulley with the feed rolls 16 at a high yrate of speed, actuating the feed rolls fast and moving the work quickly through the machine.

By the foregoing arrangement a means is provided for accurately and automatically changing the speed of rotation of the feed rolls whereby the work is advanced fast or slow through the machine in accordance with the grinding or non-grinding position of the grinding members. The particular device illustrated is, of course, susceptible of modification and the invention is limited only by the terms of the appended claims.

I claim:

1. In a device `of the class described, the combination of` stay grinding mechanism including grinding members. means for bringing the grinders into and out of grinding` position, means for feeding the work continuously in one direction, and shiftable means for automatically increasing the speed ofthe feeding means when the grinding members are out of grinding position, substantially as described. y

2. In a device of the class described, the combination of stay grinding mechanism including grinding members, means for bringing the grinding members in and out of grinding position, means for feeding the work through the machine continuously in one direction, means for actuating said feeding means including a differential pulley and belt connection, and means for automatically shifting said belt to increase the speed of the feeding means when the grinding members are out of grinding position, substantially as described. y

3. In a device of the class described, the combination of staygrinding mechanism including grinding members, means for bringing the grinding members in and out of grinding position, means for feeding the work continuously in onev direction, shiftable means for increasing the speed of the feeding means when the grinding members are out of grinding position and a single cam for controlling said shiftable means, substantially as described.

. 4. In a device of the class described, the combination of stay grinding mechanism including grinding members, means for'bringing the grinding members into and out of grinding position, mea ns for feeding the work continuously in one direction, a drive shaft and a driven shaft, differential pulleys on the drive shaft, differential pulleys onthe driven shaft, belts connecting said drive shaft and driven shaft pulleys. a connection between the driven shaft and the feeding means. belt shifting means, said means when shifted in one directionu transmittinga relatively slow drive to the driven shaft and when moved in the other direction transmitting a relatively fast drive to the driven shaft, said latter drive occurring when the grinding members are out of grinding position With respect to the Work and means for automatically actuating said belt shifter in Correspondence With the movement of the grinders, substantially as described.

5. In a device of the class described, the combination of stay grinding mechanism including grinding members, means for bringingV the grinding members into and out of grinding position, means for feeding the Work continuously in one direction, a drive shaft and a driven shaft, differential pulleys on the drive shaft, differential pulleys on the driven shaft, belts connecting said drive shaft and driven shaft pulleys, a connection between the driven shaft and the feeding means, belt shifting' means, said means when shifted in one direction transmitting` a relatively slow7 drive to the driven shaft and when moved in the other direction transmittingr a relatively fast drive to the driven shaft, said latter drive occurring when the grinding members are out of grinding position and a single cam for automatically moving said belt shifting` device in correspondence with the position of the grinders, substantially as described.

HERMAN A. KELLER. Witnesses:

A. V. BROWN, R. B. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of '.Patents,

Washington, D. C. 

